Spark-plug protector



M. M. SHARP.

SPARK PLUG PROTECTOR.

APPLICATION FILED AUG-16.1919.

1,41 1,1 94;, Patented Mar. 28, 1922.

umrso STATE PATENT. OFFICE.-

KGBiRISOH,M. SHARP, OF WAXAHACHIE, TEXAS, ASSIGNOR OF ONFPBALF T0 C. A.

' SHARP, OF WAXAHQACKIE, TEXAS.

SPARK-PLUG PROTECTOR.

Lem-L194.

specification of Letters Patent. P t t d Man 2 192;;

Application filed August 16, 1919. Serial No. 317,969.

Waxa-hachie, in the county of Ellis and State of Texas, have invented certain new and useful Improvements in a SparkJPlug Protector, of which the following is a specification.

This invention relates to attachments for spark plugs and more particularly to a protector or shield adapted to be placed over the spark plug to protect the plug from moisture during inclement weather.

One of the primary objects of the invention is to provide a protector'hood which may be mounted on the plug and held in position by the usual removable not so that the hood will be firmly fixed against accidental or casual displacement.

Another object of the invention is to provide a protector hood of this character which will permit a free circulation of air around the plug but which will be arranged as to prevent splashes of water reaching the upper portion or insulator end of the plug.

A further object of this invention is the provision of a device of this character which consists of comparatively few parts, is simple in construction but durable and well adapted to withstand the rough usage to M. Srmnr,

which devices of this character are ordi narily subjected.

For a full description of the invention and the advantages and merits thereof, refcrenc e is to be had to the following description and accompanying; drawings, in which Figure l is a side elevation of a spark plug. shown diagrammatically and illustratmg the application of the device, the latter being shown in cross section.-

Fi ure 2 is a perspective view of the protector hood in inverted position.

Figure 3 is a perspective view of the complementary shield.

Referring to the drawings, wherein is illustrated the preferred form of my IIIVBIIL tion, in which like numerals of reference indicate like or corresponding parts throughout the several views. the spark plup A is of any preferred type, the device being adapted to be attached to any of the standitrd types of spark plugs having the relatively large body portion B and a comparatively small insulator end 0. The general arrangement of spark plugs of this char actor is such as to. provide a shoulder D. The upper electrode of the plug is provided with the usual removable nut E wherel'iy the terminal F of the lead wire may be e fixed in position. Y I

The hood 5 consists of the substantially hemispherical hollow casino 6, the rounded portion of which is adapted to emluace the insulator C. The rounded portion is pro vided at its centerwith a relat n small. opening 7 through which the up trode is extended as shown to ad Fi 1 thus permitting the terminal the removable nut E to be placed in above the hood. The open end. 0 is provided at its marginal edge W1 n turned flange 8 which is relatively narrow and which thereby forms a circular opening 9 through which the body of the spark plug extendsl A complementary shield 10 is provided which consists oi a circular disk having a central opening 11 through which the insulator C may be extended. This complementary shield 10 rests upon the shoulder D and its outer diameter-is approxiface of the complementary shield 10 and thereby be prevented from splashing up into the hollowinterior of the hood. The disk 10 therefore, co-operates with the hood in protectingthe interior of the face from the moisture and water-which might otherwise gain access thereto.

The fact that the'shield is substantially hemispherical will cause it to rapidly drain 100 the water from the top and the flange will prevent the water from assing into the hollow interior of the hoo when the water splashes during a severe rainstorm.

The foregomgdescription and accom- 105 panying drawings have reference to what might be considered to be the approved or preferred form of my invention. T desire to be understood that I may make such changes in the construction, combination. 110

ii U,

tending outward above the flange to beyond the polygonal body.

2. A spark plug, provided with an insulator and polygonal body below the insulator, a hood covering the insulator and provided. with an integral flange extendinginward at the top part of and opposite the polygonal body, and a baffle supported on the plug extending outward above the flange to beyond the polygonal b0dy.'

In testimony whereofl affix my signature.-

MoRRiso'N M. SHARP. 

